Over the past decade, in both the United States and China, several super-size companies have come to dominate search, e-commerce, and e-communications. And now these companies are beginning to expand their reach into new markets and new sectors, including artificial intelligence and autonomous vehicles. Eventually, their expansion may bring them into greater direct competition and conflict with implications for future U.S.-Chinese economic relations. The Roundtable will explore the corporate models of these companies, how they compare, and what the implications are for the US and Chinese economies and the larger world economy.